• Design and implement integrations between Oracle HCM Cloud and external systems. • Query and optimize Oracle HCM tables and metadata; ensure referential integrity across HR, benefits, and time data. • Develop high-quality code using PL/SQL, SQL, and scripting languages for transformations, validations, and automation. • Build interfaces using HCM Extracts, HDL, Fast Formulas, BI Publisher, and OIC or similar middleware. • Implement REST/SOAP APIs, SFTP/file-based transfers, and secure integration patterns. • Optimize queries and batch processes for large-scale HCM data operations. • Enforce data privacy (PII), SOX controls, and audit readiness. • Instrument integrations with logging and alerts; troubleshoot and resolve issues promptly. • Create technical specs, mappings, and runbooks; maintain version control and CI/CD pipelines. • Work closely with HRIS, Payroll, and IT teams; mentor junior developers.